DUBAI, United Arab Emirates (AP) — The Middle East’s biggest airline, Emirates, said Wednesday it is halting flights to and from the Pakistani city of Peshawar because of security concerns a day after a gunman opened fire at a plane landing at the airport.

Other carriers based in the Persian Gulf, a key gateway for travel to Pakistan, were also reassessing their operations to the city. Peshawar is located on the edge of restless tribal regions where militant groups such as al-Qaida and the Taliban are based. The area has become a frequent target of bombings and shootings over the years.